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Registros recuperados: 40
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Acute Toxicity of Herbicides and Sensibility of Aquatic Plant Wolffia brasiliensis as a Bioindicator Organism Planta Daninha
PEREIRA,P.C.; BRUNETTI,I.A.; CASTRO,K.S.; CHIAROTTI,L.F.; SANTOS,B.E.; MORAES,J.C.; CRUZ,C..
ABSTRACT: This study aimed to establish the mass cultivation of Wolffia brasiliensis under laboratory conditions, determine the sensitivity of reference substances (potassium dichromate, sodium chloride, and potassium chloride), and estimate the acute toxicity (LC50;7d) for the herbicide glyphosate, diquat, paraquat, imazapyr, 2,4-D, saflufenacil, imazamox, penoxsulam, metsulfuron-methyl, and atrazine. Three media were tested for culture establishment: Hoagland’s medium, 5.0 g L-1 NPK fertilizer (20-5-20), a mixture of Oxisol + organic substrate of decaying aquatic plant (2:1; v v-1). Sensitivity tests with reference substances and acute toxicity for herbicides were carried out after establishing the cultivation. The species W. brasiliensis presented an...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Macrophytes; Chemicals; Ecotoxicology; Reference substances; Pesticides.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100289
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Addition of residues and reintroduction of microorganisms in Jatropha curcas cultivated in degraded soil AGRIAMBI
Santos,Adriana A.; Agustini,José A.; Maltoni,Katia L.; Cassiolato,Ana M. R..
ABSTRACT The aim of this study was to evaluate, through mycorrhization (root colonization and number of spores of arbuscular mycorrhizal fungi - AMF), leaf acid phosphatase and soil chemical characteristics, the effects of the addition of residues (macrophytes and ash), hydrogel and the reintroduction of microorganisms in a degraded area cultivated with jatropha. Degradation occurred when the surface soil was removed during the construction of a hydroelectric power plant. The experiment was set in a randomized block design, using a 2 x 2 x 4 factorial scheme, i.e., two inoculation treatments (with and without soil-inoculum), two hydrogel treatments (with and without) and four with the addition of residues (macrophytes - MAC, ash, MAC + ash and control,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Jatropha curcas L.; Arbuscular mycorrhiza; Hydrogel; Macrophytes; Cerrado..
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000400372
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Addition of waste and introduction of microorganisms after 45 years of soil degradation Rev. Ciênc. Agron.
Santos,Adriana Avelino; Agustini,José Antônio; Maltoni,Kátia Luciene; Cassiolato,Ana Maria Rodrigues.
ABSTRACT The construction of hydroelectric power plants (HPP) may result in environmental problems, such as extensive areas of exposed subsoil and conditions of extreme degradation. These areas require alternative that minimize impact and allow partial recovery of their ecosystem functions and vegetation. This study aimed to evaluate the effects of residue addition (organic/macrophytes - OR and inorganic/ash - AR), hydrogel, and inoculation of microorganisms in degraded soil, cultivated with Jatropha curcas, through fertility and microbial activity. A conserved Cerrado ("savannah") soil was the source of microorganisms - mainly mycorrhizal fungi. The experiment was conducted for 12 months (during 2010/2011) at the farm of UNESP-School of Engineering/Campus...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Jatropha curcas; Macrophytes; Sugar cane ash; Hydrogel; Cerrado; Microbial activity.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000300363
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Anatomy and physiology of Cattail as related to different population densities Planta Daninha
CORRÊA,F.F.; MADAIL,R.H.; BARBOSA,S.; PEREIRA,M.P.; CASTRO,E.M.; SORIANO,C.T.G.; PEREIRA,F.J..
The objective of this work was to evaluate the effects of the population density of Typha angustifolia plants in the anatomical and physiological characteristics. Plants were collected from populations of high density (over 50% of colonization capacity) and low density (less than 50% of colonization capacity) and cultivated under controlled greenhouse conditions. Plants from both populations were grown in plastic trays containing 4 L of nutritive solution for 60 days. At the end of this period, the relative growth rate, leaf area ratio, net assimilatory rate, root/shoot ratio, leaf anatomy, root anatomy, and catalase and ascorbate peroxidase activities were evaluated. Plants from high density populations showed increased growth rate and root/shoot ratio....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Macrophytes; Typha angustifolia; Morphological plasticity; Plant growth; Ecological plant anatomy.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000100001
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Arbuscular mycorrhizal fungi and dark septate fungi in plants associated with aquatic environments Acta Botanica
Marins,Josy Fraccaro de; Carrenho,Rosilaine.
ABSTRACT There have been several reports of symbionts in the roots of plants that live in aquatic environments. Arbuscular mycorrhizal fungi (AMF) are the most common microsymbionts and possibly recolonized the aquatic environment together with plants; however, their functions and the extent of their benefits are unclear. Furthermore, the presence of other groups of fungi, such as dark septate fungi (DSF), with functions supposedly analogous to those of mycorrhizal fungi, has also been reported. The present work provides a compilation of data regarding the presence of arbuscular mycorrhizae in plants from, or under the influence of, aquatic environments, and co-colonization by AMF and DSF. Forty species of non-vascular plants, ferns, fern allies, and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Colonization; Flooding; Fungal co-occurrence; Macrophytes; Taxonomic diversity.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000200295
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Bilan méthodologique de l’outil de diagnostic de l’eutrophisation du RSL. Quatorze années de résultats en Région Languedoc-Roussillon ArchiMer
Ifremer.
Ce travail présente un bilan de l’outil de diagnostic de l’eutrophisation mis en oeuvre depuis 2000 dans le cadre du Réseau de Suivi Lagunaire. Cet outil repose sur l’étude de quatre compartiments : sédiments, macrophytes, colonne d’eau et phytoplancton. Un récapitulatif de la méthode actuelle de diagnostic et de ses évolutions depuis le début du RSL est présenté (pour chacun des compartiments puis pour la méthode de diagnostic complet). Des analyses statistiques ont permis d’étudier la pertinence de la stratégie de suivi et de la grille de diagnostic de chaque compartiment. Les résultats permettent de préconiser un maintien des stratégies de prélèvements du sédiment et des macrophytes et l’arrêt des suivis annuels de la colonne d’eau et du phytoplancton...
Tipo: Text Palavras-chave: Réseau de Suivi Lagunaire; Lagune; Eutrophisation; Méthode de diagnostic; Sédiment; Macrophytes; Phytoplancton; Colonne d’eau; Prélèvement; Analyse; Grille de qualité; DCE.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00165/27662/25839.pdf
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Bioaccumulation and chemical forms of cadmium, copper and lead in aquatic plants BABT
Hu,JinZhao; Zheng,AiZhen; Pei,DongLi; Shi,GuoXin.
The cadmium(Cd), copper(Cu) and lead(Pb) accumulation, as well as their relative content of different chemical forms in Sagittaria sagittifolia L. and Potamogeton crispus L. were determined. The results showed that both the plants had the ability to accumulate large amounts of Cd, Cu and Pb, and they absorbed metals in dose-dependent manners. The roots of S. sagittifolia appeared more sensitive to Cd and Pb than the leaves of P. crispus. The potential of Cu uptake by these two plant tissues was similar. Under the same concentration, the uptake of Cu for both the plants was higher than Pb and Cd, while that of Pb was lowest. The Cd, Cu and Pb existed with various forms in the plants. Cd and Pb were mainly in the NaCl extractable form in S. sagittifolia and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Heavy metals; Phytoextraction; Macrophytes; Sagittaria sagittifolia L.; Potamogeton crispus L..
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000100029
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Cadmium pathways in an exploited intertidal ecosystem with chronic cadmium inputs (Marennes-Oleron, Atlantic coast, France) ArchiMer
Pigeot, J; Miramand, P; Guyot, T; Sauriau, Pierre-guy; Fichet, D; Le Moine, Olivier; Huet, V.
The Marennes-Oleron Bay is subject to chronic pollution by cadmium (Cd) from the Gironde watershed. An ecosystem approach was used to study the fate of cadmium in the different biological compartments. The median Cd concentration was 0.4 mu g g(-1) dry weight for the 63 benthic species measured. When combined with the respective biomasses for the different species studied, we estimated that 7 kg of Cd is partitioned into the soft tissues of the benthic species in the bay. The majority of this cadmium was distributed between primary producers, mainly microphytobenthos (40 %), and suspension-feeders, mainly oysters (40 %). All other benthic species measured were associated with negligible masses of Cd. Two trophic levels contained 98 % of the Cd: 3 kg was...
Tipo: Text Palavras-chave: Marennes Oleron Bay; Trophic food web; Bioaccumulation; Cadmium; Macrofauna; Microphytobenthos; Macrophytes.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-3615.pdf
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Campagne de surveillance DCE 2015 en Méditerranée française. Districts « RHONE ET COTIERS MEDITERRANEENS » ET « CORSE » ArchiMer
Witkowski, Fanny; Andral, Bruno; Derolez, Valerie; Tomasino, Corinne.
Sur la façade méditerranéenne, l'Ifremer a assuré en 2015 une partie logistique de la quatrième campagne du contrôle de surveillance DCE et la coordination de la caractérisation de plusieurs éléments de qualité. Les résultats de la quatrième campagne de contrôles de surveillance DCE permettent de caractériser la qualité de 45 masses d’eau littorales suivies en 2015. Dans le district « Rhône et côtiers méditerranéens » (volet 1), 3 des 18 masses d’eau côtières (MEC) sont déclassées pour la chimie au regard des résultats acquis dans la matière vivante, tandis que l'ensemble des MEC suivies pour le phytoplancton affichent un bon état. Dans les masses d’eau de transition (MET), la chimie matière vivante déclasse 7 MET, le suivi dans l'eau (échantillonneurs...
Tipo: Text Palavras-chave: Surveillance; Phytoplancton; Macrophytes; Substances prioritaires; Bioaccumulation; État biologique; État chimique; Eaux côtières; Eaux de transition.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00394/50583/51272.pdf
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Checklist of the macroalgae of Thau Lagoon (Herault, France), a hot spot of marine species introduction in Europe ArchiMer
Verlaque, Marc.
A checklist of macroalgae in Thau Lagoon (Herault, France), based on literature records and new collections, is given. Using present-day taxonomy, 196 taxa and stadia of macroalgae have been identified to date. Sixty of these were no longer found in the samples, 36 were new to the lagoon, and the taxonomic identity of 15 species was amended. Twenty-five new introduced taxa were identified, giving a total of 45 introduced macroalgae for the flora (23% of total). Among these, 17 taxa and several genera (Acrorhrix, Chondrus, Dasysiphonia (?), Prionitis) are new to the Mediterranean Sea and 12 are new to Europe. The majority (43 taxa) may originate from the Pacific region, having arrived either directly or via other aquaculture sites. A highly probable vector...
Tipo: Text Palavras-chave: Méditerranée; Étang de Thau; Inventaire; Macrophytes; Espèces introduites; Mediterranean Sea; Than Lagoon; Macroalga; Checklist; Introduced species.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/00322/43368/42842.pdf
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Comparison of diversity indices applied to macrophyte incidence-based data BABT
Evangelista,Heloísa Beatriz Antoniazi; Thomaz,Sidinei Magela; Evangelista,Luiz Roberto.
In this work, a recently proposed diversity index based on Patil and Taillie parametric diversity measure (or Tsallis entropy), Sq*, was applied to samples (presence-absence data) of macrophytes from the Itaipu Reservoir, Brazil. This new index was the value of the family of indices Sq for a specific evenness of a sample. Results demonstrated that the Shannon index and species richness showed expressively high correlation with the Sq*; however, the evenness had low correlation coefficients with the index Sq*, indicating that Sq* was particularly sensitive to rarity and species richness. On the other hand, the weak correlations of this index with evenness demonstrated that it was less sensitive to species relative abundances.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tsallis entropy; Macrophytes; Reservoir; Shannon; Simpson.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000200014
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Diagnostic de la qualité du compartiment macrophytes des lagunes profondes dans le contexte de la Directive Cadre sur l’Eau (bassin Rhône Méditerranée & Corse). Propositions d’évolution de la stratégie d’échantillonnage ArchiMer
Derolez, Valerie; Oheix, Jocelyne.
Dans le contexte de la mise en œuvre de la Directive Cadre sur l’Eau (DCE) dans les lagunes méditerranéennes, un diagnostic de la qualité des peuplements de macrophytes est effectué tous les trois ans. Certaines lagunes du bassin Rhône Méditerranée et Corse sont caractérisées par des profondeurs importantes, qui peuvent constituer une limite naturelle au développement des espèces de référence, dont les herbiers de zostères et de cymodocées représentent la part la plus importante en terme de recouvrement. L’objectif de ce rapport est d’analyser les diagnostics des macrophytes et l’impact des stations profondes de plus de 5 mètres sur la qualité des diagnostics pour les étangs de Ponant, Diana, Urbino, Thau et Berre. Cette analyse est complétée par des...
Tipo: Text Palavras-chave: DCE; Lagunes; Macrophytes; Zostères.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00114/22528/20205.pdf
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Do littoral macrophytes influence crustacean zooplankton IPB - Escola Superior Agrária
Geraldes, Ana Maria; Boavida, Maria José.
In a meso-eutrophic reservoir, cladoceran and copepod assemblages were characterised in two sampling sites: One located in the pelagic zone (site 1) and the other in the shallow littoral zone (site 2), the latter colonised by emergent macrophytes. Samples were collected biweekly from June to July 2001 and from May to July 2002 at the two sites. At site 1, crustacean zooplankton samples were obtained by vertical hauls using a Wisconsin type net of 64 mm mesh size. At site 2 several random samples were obtained using a van Dorn bottle. Those samples were pooled together and the total sample was sieved through a 64 mm mesh size. Macrophyte relative abundance for each species was visually estimated. Macrophyte community was composed of Glyceria declinata,...
Tipo: Article Palavras-chave: Zooplankton; Cladocera; Copepoda; Reservoir; Macrophytes; Pelagic zone; Llittoral zone.
Ano: 2004 URL: http://hdl.handle.net/10198/708
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Efeitos da ocupação do solo, do uso da água e da idade das albufeiras nos parâmetros ambientais e na estrutura das comunidades zooplanctónicas IPB - Escola Superior Agrária
Geraldes, Ana Maria.
O presente trabalho decorreu em três albufeiras de idades distintas e sujeitas a diferentes tipos de perturbações de origem antropogénica. Estes sistemas aquáticos localizam-se na parte portuguesa da Bacia Hidrográfica do Rio Douro, na região de Trás-os-Montes. A albufeira da Serra Serrada foi criada em 1995 com o objectivo de abastecer de água a cidade de Bragança, actualmente com 34.750 habitantes. Como consequência do intenso consumo de água ocorrem flutuações de grande amplitude no seu nível. Por outro lado, na bacia de drenagem desta albufeira a pastorícia é particularmente intensa durante o Verão. Devido a esta actividade ocorrem nesta área, fogos frequentes que são induzidos pelos pastores com o objectivo de obterem melhores pastagens. A albufeira...
Tipo: Book Palavras-chave: Albufeiras; Estado trófico; Uso do solo; Idade das albufeiras; Qualidade da água; Flutuações no nível da água; Variáveis ambientais; Comunidades fito e zooplactónicas; Precipitação; Macrófitos; Actividade da fosfatase alcalina; Regeneração do ortofosfato; Nutrientes; Reservoirs; Trophic state; Nutrients; Land use; Reservoir age; Water quality; Water level fluctuation; Environmental variables; Phytoplankton and zooplankton assemblages; Precipitation; Macrophytes; Kaline phosphatase activity; Orthophosphate regeneration.
Ano: 2004 URL: http://hdl.handle.net/10198/770
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Effects of graphene oxide on aquatic macrophyte under the influence of humic substances. Repositório Alice
JONSSON, C. M.; CLEMENTE, Z.; CASTRO, V. L. S. S. de; CASTANHA, R. F.; VALLIM, J. H.; DOMINGOS, N.; BLUMEL, S..
The behavior of nanostructured graphene oxide (GO) in the environment is complex and must be completely understood to evaluate the risk involved. Studies show that humic acid (HA) can stabilize nanomaterials in water and change its behavior. The aquatic macrophyte duckweed (Lemna minor) is a good plant model for adverse effects evaluation of many test-materials due to its fast growth and small size. This study assessed the effect of GO, with and without HA, on the growth of L. minor on fronds number and biomass changes. The plants were exposed during 7 days to the nominal concentrations of GO equals to 0.0 (control), 0.1, 1.0, 10.0 and 100.0 mg L-1, in the absence or in the presence of 20 mg L-1 of HA. Tests were conducted in multiwell polystyreneplates...
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Macrophytes; Graphene.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1068118
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Effects of natural banks of free-floating plants on zooplankton community in a shallow subtropical lake in Southern Brazil BABT
Gazulha,Vanessa; Montú,Mônica; Marques,David da Motta; Bonecker,Claúdia Costa.
The aim of this study was to test the effects of natural free-floating plants on zooplankton distribution in a shallow subtropical lake. First, the hypothesis that free-floating plants have an effect on physico-chemicals, leading to a decrease on nutrient availability and influencing the phytoplankton biomass and zooplankton community was tested. Second, the hypothesis that free-floating plants act as a refuge for zooplankton was tested. Three microhabitats were selected: free-floating plants, littoral area and open water. Results demonstrated that the effects of different microhabitats on phytoplankton biomass and physico-chemicals were not significant, indicating a weak influence of the plants. Zooplankton densities were higher in free-floating plants...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Macrophytes; Refuge; Spatial distribution; Tropical zooplankton.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000400014
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Enregistrement d'images vidéo géoréférencées par caméra remorquée dans les lagunes de Méditerranée. Expérimentations pilotes dans les étangs de Leucate (Juin 2004), de Thau et d'Ingril (avril 2005). ArchiMer
Oheix, Jocelyne.
Dans le cadre du Réseau de Suivi Lagunaire, des images vidéo géoréférencées par caméra tractée ont été réalisées dans trois lagunes de Méditerranée : Thau, Leucate et Ingril avec la collaboration de l'équipe d'Ifremer/Toulon qui assure le développement technique de l'outil d'acquisition d'images dans le cadre du projet « Prisme ». L'objectif est de déterminer la faisabilité technique en lagune puis d'optimiser l'exploitation des données. Ce rapport présente les résultats de la mise en œuvre de la caméra tractée, du rejeu des images et de la représentation cartographique des données sous SIG. Ces expérimentations ont permis de définir une typologie d'utilisation de la vidéo tractée en lagune: - Recouvrement végétal, - Cartographie d'herbier, - Grand type de...
Tipo: Text Palavras-chave: Lagunes littorales; Méditerranée; Vidéo sous-marine remorquée; Diagnostic; Macrophytes; Coastallagoon; Mediterranean; Towed submarine video; Diagnostic; Macrophytes.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/00113/22400/20092.pdf
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Epiphytic diatoms (Diatomeae) from Piraquara II urban reservoir, Paraná state Biota Neotropica
Marra,Raquel Cristina; Tremarin,Priscila Izabel; Algarte,Vanessa Majewski; Ludwig,Thelma Veiga.
Abstract We conducted a taxonomical study of epiphytic diatoms on the macrophytes Polygonum hydropiperoides, Ludwigia peruviana and Alternanthera philoxeroides collected in the mesotrophic reservoir Piraquara II flooded in 2009, located in the state of Paraná. A total of 135 infrageneric taxa were identified, among them five at generic level and other five are first records to the state. We provided illustration, valve metrics, meristics limits and taxonomic reference for each taxon. Also, life forms and species frequency are given. The most frequent diatoms totalized 15.3% of total identified taxa and sporadic species represented 54.7%. Achnanthidium minutissimum (Kützing) Czarnecki and Brachysira neoexilis Lange-Bertalot occurred in more than 90% of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bacillariophyta; Freshwater; Macrophytes; Mesotrophic; Periphyton; Taxonomy.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032016000400303
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Étude et modélisation des populations de macrophytes dans la lagune de Thau (Hérault, France) ArchiMer
Plus, Martin.
The works carried out can be divided in three main lines : design and management of experimental studies on primary production processes, macrophyte spatial distribution study and development of macrophyte and seagrass numerical models. In situ and in vitro experiments have been performed with the aim of studying the processes and the parameters involved in the photosynthesis-respiration system, as well as to establish the main biotic (self-shading effect, physiology of the photosynthesis, carbon, nitrogen and chlorophyll tissu contents) and abiotic (temperature, light and nutrients) factors controlling macrobenthic primary production. A seagrass ecosystem model based on nitrogen and oxygen fluxes has been developped. Model calibration and validation have...
Tipo: Text Palavras-chave: Primary production; Light; Nitrogen; Nutrients; Mathematical model; Thau lagoon; Seagrass; Macrophytes; Production primaire; Lumière; Azote; Nutriments; Model mathématique; Thau; Phanérogames; Macrophytes.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/2001/these-6518.pdf
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Fish assemblages in stream stretches occupied by cattail (Typhaceae, Angiospermae) stands in Southeast Brazil Neotropical Ichthyology
Rocha,Fabíola Carla da; Casatti,Lilian; Carvalho,Fernando Rogério; Silva,Alexandre Marco da.
Macrophytes are a major component of lentic and lotic aquatic ecosystems. As consequences of environmental degradation, species of cattail (genus Typha) may become dominant along streams. The purpose of this study was to investigate the structure and feeding of fish assemblages in stream stretches under influence of Typha sp., also addressing the influences of temporal variation on composition, abundance, biomass, diversity, species richness, and feeding of fish. Six streams (labelled S1-S6) in the upper rio Turvo basin, southeast Brazil, with dense stands of Typha sp. in the instream and riparian habitat, were studied in six campaigns during three central months in both of the dry and wet periods, by using a standardized collection effort. Thirty-seven...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Disturbance; Chironomidae larvae; Detritus; Macrophytes; Upper rio Paraná.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000200016
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